Cancer Care Specialists of IL

Why Choose Cancer Care Specialists?

Cancer Care Specialists of Illinois is dedicated to providing quality medical oncology, hematology, and radiation oncology services. With 20 locations and an excellent team of physicians and staff, we provide award winning, personalized care – close to home in Central and Southern Illinois, and now in St. Louis Metro East.

Patients of Cancer Care Specialists receive personalized, comprehensive care using state-of-the-art equipment and treatment methods. In addition, CCSI is affiliated with several National Cancer Institute supported research organizations which provide advanced research and treatment opportunities.

Specialties & Services

Medical Oncology & Hematology, Radiation Oncology

Research & Clinical Trials

Through the CREATE – Cancer Research and Therapies of Excellence program, CCSI physicians and staff actively participate in cancer research in order to help improve both cancer treatment and prevention.

Cancer Care, Close to Home

We have cancer treatment centers and clinics throughout Central and Southern Illinois, and are serving the St. Louis Metro East at our newest cancer treatment centers in Swansea and Sparta, and coming soon to O’Fallon, IL.

MyChart

Access your information and communicate with us online or with the MyChart app.

World-Class Physicians

We are proud to be leaders in our field. Our Doctors, providers and support staff are passionate about what they do.

Referrals & Inquiries Welcome

We work with your primary care physician to create the best plan for your personalized care. We encourage patients and family to ask questions to better understand their care options.

CCSI News

February 6, 2020

Welcome Camille M. Williams, MD

Decatur, IL – Cancer Care Specialists of Illinois (CCSI) is pleased to announce the addition of Dr. Camille M. Williams, radiation oncologist, to its practice in January 2020. Dr. Williams will primarily see patients at the new Cancer Care Center of O’Fallon (opening in Spring 2020). She will also provide occasional radiation oncology services in […]

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Meet Our Physicians & Providers

Medical Oncology / Hematology

James L. Wade III, MD, FACP, FASCO

Benjamin T. Esparaz, MD, FACP

Philip A. Dy, MD

Perry P. Guaglianone, MD, FACP

Mario R. Velasco Jr., MD, FACP

Hanna M. Saba, MD

Sebastien S. Kairouz, MD

Bassam N. Maalouf, MD

Mark A. Walshauser, MD, FACP

Justin D. Floyd, DO, FACOI

Gibran H. Mahmud, MD

Evelena P. Ontiveros, MD, PhD

Vijay K. Damarla, MD, MPH

Kristi M. Toennies, FNP, AOCNP

Christel G. Wheeler, FNP-BC

Radiation Oncology

Edward C. Elliott, MD, FACR, FCAP

Mary Anne de Paz, MD

Renata C. Moore, MD

Seong R. Cho, MD

Harold A. Yoon, MD

Casey E. Duncan, MD

Camille M. Williams, MD

Diplomates of the American Boards of Internal Medicine, Medical Oncology, Hematology, Radiology, and Pathology.

Affiliated with National Cancer Institute supported research organizations including University of Chicago, SWOG, ECOG-ACRIN Cancer Research Group, NRG Oncology, University of Rochester Cancer Center, Wake Forest University Cancer Center, NCI Cancer Trials Support Unit, Heartland Cancer Research NCORP and Alliance for Clinical Trials in Oncology.